Resonator for sound-reproducing devices.



w. B. HOLLINGSHEA'D.

L L OD RESONATOR FOR SOUND REPRODUCING DEVICES. vAPPLICATION FILED Nov. l?. 1913.

vga f Patented Feb. 29, 1916.

2 SHEETS-SHEET l.

MORRIS PETERS. MC.. LITHU., WSHINGTGN. D. C.

W. B. HOLLINGSHEAD. y RESONATOR FOR SOUND REPROOuOmG DEVICES.

APPLICATION FILED NOV. I7, 1913.

Patented Feb. 29,1916.

2 SHEETS-SHEET 2.

Tee?

.1 ...w91 A.: WENN@ -@llwuj A Hanley]` UNITED sTATEs PATENT oEEIoE.

v WILLIAM B. HOLLINGSHEAD, OF MOUNT VERNON, NEW-YOBK, ASSIGNOR F ONE-HALF TO WALDO G. MORSE, OF YONKEBS, NEW YORK. i

L. chine communicates.

RESONATOR FOB SOUND-REPBODCING DEVICES.

Specification of Letters Patent. I

Patented Feb. 29, 1916.

Application led November 17, 1913. Serial No. 801,471.

To all whom ztmay/ concern.' I Bie it known Athat I, WILLIAM B. HOL- LINGsi-IEAD, a citizen of the United States, residing in the city of Mount Vernon, county of lVestchester, and State of New York, have invented a certain new and useful Resonator for Sound-Reproducing Devices, of which the following is a speciication. u

In the4 following specification I will describe my improved resonator in connection with a talking machine, but it is. obvious. vthat it may be used. in other situations.

The. object I have in View herein is to provide a resonator for talking machines or the like in which the megaphone or horn is entirely eliminated.'y

A further object is to produce a device in which the intensity of the sounds may be increased or diminished.

A further object is to increase the volume of tone b v inserting, in the path of the sonorous waves, bodies capable of vibrating together with the principal vibrating body. These vibrating bodies or septa are rigidly attached to the body of the resonator which incloses the talking machine mechanism and with which the tone arm of the talking maedges which are capable of free vibration.

The septa may be made of variable thickness .or may be weighted to synchromze them. and the walls of the resonator' or cabinet are provided with valved openings for the escape of the amplified sound waves.

In the drawings I have illustrated my invention in connection with a phonograph of the diSktype. but it isto be understood that I do not limit my 'invention to machines ,ofthis character, and that my inven-v tion is equally adaptable to talking machinesof the cylindrical type.

These and further objects will more `fully and accompanying drawings, considered together or separately, in :which- Figure 1 is a plan view" of my improved resonator showing thel same applied to a disk record talking machine. Fig. 2 is a horizontal section on the line 2-2 of Fig. 4. Fig, 3 is a. frontelevation of the device. Fig. 4 is a section on the line of Fig. 1.` Fig. 5 is a section on the line 5-5 of Fig. 2. Fig. 6 is a section on the line 6-6 of Fig. Q. Fig. 7 is a horizontal sectional The septa have free l specifications or closethe same. are each perforated as at @1 -24 and 11 view' of a modification, th section being taken on the line 7--7 of 8. Fig. 8 is -a section on` theline 8 8 0 Fig. 7. 'Fig'.

9- is a perspective view of a modiiied form of septum. Flg. 10 is a detail view of a further modification. 'Fig 11 is a detail.

view of astill further modification showing a pair of unperforated diaphragms.

In all '.Views, like parts are designated by the same reference characters.

1 represents the -bottom of the resonator, and 2, 3, 4 and 5 the front, rear and side walls thereof.

6 represents a removable diaphragm covering the resonator, and'7 a perforated dia.

phragm situated a short distance above the bottom 1.

The bottom 1 carries a motor 8 of any suitable construction, and the motor-is provided with the usual turntable on which the record rests. v.Cooperating with the record is a sound box 9' of any well known type.

The sound box is carried by and communi-- Cates with a'sound arm 10. The sound arm offers a free passage between the soundY box and the interior'of the resonator. The bottom l is provided with a series of openings 11 to allow for the passage, of air.

Rigidly secured to the diaphragm 7 are vibratory septa 12-12 and 13-13. v,These l septa are free except where secured to the diaphragm, andthe septa 12-'12 are provided with openings lll-14. Slides 15-15 operatable from the exterior of the resonator are provided to close or disclose the open- Lings 14E-14.

The diaphragm 7 is tfprovided with an opening 16 through which the standardf'of the motor passes. and with a series of perforations 17 for the admission of air to the resonator. The' openings 17 are controllable by means of a valve 18.

The diaphragm 6 has an opening 19 through which the shaft of the motor provjects and is further provided with a plu rality of valved openings 20 for the escape of sound waves. The front Q is provided with sound openings Q1. and these openings may be covered with gauze, as is usual, to prevent the entrance pf dust, etc, an'd all other openings may b` (,yvered with gauze. The rear wall 3 is equipped with a series of openings 22, and .a slide '23 is used to open The side walls l and 5 dampers .25-25 are used to control such pcrforations.

It will be obvious that `only one or any number of septa maybe used if desired.

It will be obvious that the septa 19. and 13 may be secured to the diaphragm 6, or to either of the Walls 2, 3, -I Vand 5 instead of to the diaphragm 7 without departing from the spirit or scope of my invention.

In Figs. T and S, I show'a modification of my improved resonator in which the device is used in connection with a cabinet for storing records, etc. In this case I provide a duct for affording an air passage from below the cabinet to the resonator. The duct is provided with a partition 27 extending entirely across it and with a damper 28 for governing the admission of air and the egress of sound Waves. The side and rear walls of the duct are provided with valved openings 29 and 30. The Jfront, side and rear `Walls and the partition of the duct are resonant and in addition the partition is free to vibrate.

"1; he septa 31 of Figs. 7 and 8 are arranged in U-Shape; are secured to the bottom 1a which supports the motor SL and extend across the duct 26, almost to the rear wall afa The height of thesepta, as in those shown inIiigs. et and 5 is somewhat less than the height of the chamber 'of the resonator. This allows for the free passage of the sound waves over the free edges of the septa. The side septa, as shown in Fig. 8

are provided with openings 32.

The cabinet shown in Fig. 8 is provided with a cover and this cover 1s pierced by a plura `ty if openings 34. These opemngs are. governed uv sliding valves.

In order to increase the vibratory eiect of the scpta they may be pierced so` as to H produce a large number of vibrating edges.

In Fig. 9. I have shown a pair of septa provided with a plurality of elongated slots 35,

liti

dit

but it will be understood that openings of any other shape or configuration may be employed.

If desired the reiiecting and defiecting surfaces may be coated with a non-absorbent material which will act as a damper or sotener of the vibrations. which impinge upon them and will also act as a retarding agent and give sharper definition to pulses.

In Fig. 10, I shou7 a modification wherein the ducts 26, in addition to the damper 28 are provided with adjustable perforated diaphragme 36 for the purpose of lengthening or shortening the effective. length. of the ducts.

The operation is as follows: The sonorous waves emanating fromI the sound box 9 will traverse the sound arm 10 and. be discharged into the resonator. and projected in all directions. They will then strike against the Walls of `the chamber, be repei'itediy sont `communication with the sound box, a

v the sound box.

By attuningthe septa by varying their thickness or by Weighting them, attuning the Walls of the chamber and by adjusting the valves of the various openlngs in the Walls of the chamber, and in the septa, it is possible to produce notes of great intensity and loudness. 4

In accordance with the provisions of the patent statutesLI have described the prin-f ciple of my invention together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus shown is merely illustrative, and that the invention canbe carried out in other ways.

Having now described my invention, what I now desire to secu-re by Letters Patent is:

1. InaJ talking machine the combination.t

with a sound box, of a resonant casing in communication-With the sound box, a plurality of vibratory bo'dies within the casing. and valved openings in thelbodies.

2. In a talking machine the combination with a''sound box, of a resonant casing in communication with the sound box, vibra tory bodies vvithin'the casing, yand a diaphragm, to `which the bodies are attached r by one' edge only within the casing.

3. In a, talking machinethe combination with a sound box, of a resonant casing in communication with the sound box, a bottom for the casing, openings in the bottom, a diaphragm in the casing above the bottom and an opening in the diaphragm.

4. In a talking machine the combination with a sound box, of a resonant casin it? o tom for the casing, openings in the bottom, and a diaphragm in the casing above the bottom, said diaphragm carrying vibratory bodies, and openings in the diaphragm.

5. In a talking machine the combination Witha sound box` of a resonant casing in communication with the `sound box, a bottom for the casing. openings in the bottom, a idiaphragm carrying vibratory bodies," and openings in the bodies.

6. In a talking machine the -combination with a sound box. of a resonant casing in communication with the sound box, a bot tom for the casing and openings in the bot-` tom, a diaphragm carrying vibratory bodies, openings in the bodies, and valves for closing and disclosing the openings.

'i'. In a talking machine, the combination with a sound box. and a resonant casing in communication therewith, of box-like vioratory body Within the casing, an opening 15 1. 5f. tangular casing, a motor therein, a turnta .-inf the may l closing such `"opening.

Lima-12 and a valve for closing `.and dis- 8. In a talking machine, the'combination Vwith a sound box, of a resonant casing in communication therewith, openings in all sides of the casing, a diaphragm Within the c'asirigzg;'and4 openings in the diaphrag'm.

9; In a talking machine, :the combination with a sound boX,`o a resonant casing in' communication therewith, openings in all sides of the casing, a diaphragm within the" casing, and openings in the diaphragm, and a-valve for closing and disclosing the open ings in the diaphragm. 10.]A talking machine comprising a recble-abovethe top of the casing driven by the motor, a tone-arm -pivotaily 'mounted at y one corner of the top of the casing, a sound `box carried by the tone-arm and adapted to coact with a recordlonlhe/turntable, said' tone-arm communicating with the interior v ofthe casing, a diaphragm within the cas'- ing, one of its sides to the diaphragm and surs rounding the motor, openings in the body, and openings in all sides of the casing.

This spec1ication signed and witnessed lthis 29th day of October, 1913.

WILLIAM B. 'HoLLINcrsIaIEA'D.A

Witnessesz J. SCHECHTER, M. JONES.

a box-like Vibrator body secured alongl 

